feat: async fs

[nilptr]

changes

1. asynchronize all fs calls
2. benchmark only single thread with codspeed and remove resovler cache in benchmark, so the performance degraded

[codspeed-hq]

CodSpeed Performance Report

Merging #38 will degrade performances by 79.69%

_{Comparing nilptr:nilptr/feat/async (651a49b) with main (64b3262)}

Summary

❌ 2 regressions
⁉️ 1 dropped benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⁉️	resolver[multi-thread]	90.9 ms	N/A	N/A
❌	resolver[resolve from symlinks]	71.5 ms	352 ms	-79.69%
❌	resolver[single-thread]	86.8 ms	112.1 ms	-22.55%

[hardfist]

@nilptr thanks for your effort